US Bridges

FM over Drainage Ditch

Fair

Hamilton County, Iowa · 087253601 · Structure no. 000000000171495

Built
1976
49 years old
Condition
Fair
inspected September 2020
Type
Culvert
Steel
Length
22 ft
1 main span
Daily traffic
509
2022 count
Owner
County
County Highway Agency

About this bridge

FM over Drainage Ditch is a steel culvert carrying FM over Drainage Ditch in Hamilton County, Iowa. It was built in 1976, so it is 49 years old, older than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 509 vehicles a day, roughly 13% of them trucks, projected to reach 509 by 2043. The structure is 22 ft (6.7 m) long. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesFM
CrossesDrainage Ditch
Location087253601
RouteCounty Highway 0
CountyHamilton County
StateIowa
Coordinates42.31073, -93.70427
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2020
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans1
Design loadH 20
Structure length22 ft (6.7 m)
Longest span22 ft (6.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic509 (2022)
Projected traffic509 by 2043
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was FM over Drainage Ditch built?

It was built in 1976, making it 49 years old in 2025.

What condition is FM over Drainage Ditch in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in September 2020.

How much traffic does FM over Drainage Ditch carry?

About 509 vehicles per day (2022 count), of which roughly 13% are trucks.

How long is FM over Drainage Ditch?

The structure is 22 ft (6.7 m) long with a longest span of 22 ft (6.7 m).

Who owns FM over Drainage Ditch?

It is owned by the County Highway Agency.